There are a number of little niceties and services that make Japan a very comfortable place to live. Personally, my favorite has always been the folded toilet paper ends that can often be found in public restroom stalls everywhere. I don’t encounter them especially often, but when I do it brightens my day just like having a robin land on my window sill.
However, you can’t experience such joy without leaving yourself vulnerable to extreme disappointment as well. A prank has recently emerged in Japan which, although seemingly mundane and simple, completely shatters this sense of pleasure and leaves the victim a desolate shell of a person, just like having a robin land on your window sill and start projectile vomiting.